Update README

1 files changed, 14 insertions, 11 deletions

diff --git a/README.md b/README.md
index 0d24a56..251d5d7 100644
--- a/README.md
+++ b/README.md
@@ -2,28 +2,31 @@ CIR scripts
 ===========
 
 This is a set of script to do correlation measurement measurements
-of a DAB signal. The goal is to one day do a channel impulse
-response measurement.
+of a DAB signal. These scripts can be used to do channel impulse
+response measurements using a RTLSDR receiver.
 
 Right now there are three scripts:
 
+* correlate_with_ref.py: Finds the NULL symbol of an IQ file, and runs
+  correlations against the known phase reference to find the components.
+
 * simulate_channel.py: Reads an I/Q file generated by ODR-DabMod and
   adds some additional components, somehow equivalent to signal reflexions.
   Each reflexion has a delay and an amplitude factor.
 
-* correlate_with_ref.py: Finds the NULL symbol of an IQ file, and runs
-  correlations against the known phase reference to find the components
+* cir_measure.py: Runs a small webserver that does the correlation
+  all the time and updates a webpage (INCOMPLETE! NOT FUNCTIONAL!)
 
 Example image: ![Example correlation](./example_corr.png)
 
-The example image shows the correlation (horizontal: time delay, vertical:
-time offset of the different pieces) between a simulated channel
-and the phase reference.
-The peaks at delay indices 0, 14 and 25 are clearly visible.
+The image shows the received CIR of a real DAB signal captured with the RTLSDR.
+
+To read in a recording using a RTL-SDR receiver, use:
+
+    rtl_sdr -f 188928000 -s 2048000 -g 20 -S - | \
+    dd of=DAB_9A_10_u8_G20.iq bs=2 count=1966080
 
-Next steps
-----------
-Read in a recording using a RTL-SDR receiver.
+replace 1966080 (ten Mode 1 transmission frames) by a larger value if you want.
 
 
 Requirements